Type-writing machine.



F. A. 000K.

TYPE WRITING MACHINE.

APPLIOATIOH nun 001.28, 190a.

Patented Aprvfi, 1910.

' 2 BHEETBSHEET 1.

I. A. COOK- 'I'Y'PE WRITING MAOHINB.

APPLICATION FILED 00-1. 26, 1908.

Patented Apr.,5, 1910l' 2 SHEETS-8H EBT 2.

STATES OFFICE.

A- 006K, 0! HARTFORD. CONNECTICUT, ABSIGNOR TO UNDERWOOD TYPE- WBITER GOHPANY, 0! NEW YORK, N. Y.. A. CORPORATION OF NEW JERSEY.

.lYlE-WBITING MACHINE.

Specification 0! Letters Patent.

Patented Apr. 5, 1910.

Application filed October 26, 1908. Serial No. 458,494.

To all whom it may concern:

Be it known that I, FRANK A. CO0K, a citizen of the United States, residing m Hart-ford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements Ill Type- Writin Machines, of which the following is a speci cation.

This invention relates to means for golding aper around the platens of typewritlng mac ines.

One of the objects of the inventlon 1s to provide simplified, improved, and inexpensive means for causing the usual system of pressure rolls to bear against the platen, particularly with a view to PIOVJdlllg against weakening of thesprmgs, regulating the tension of the springs with convenience, and to simplifying and Improving the devices for releasing or dropping the pressure rolls from the platen. In carrymg out this feature of the invention I supportthe usual forward and rear pressure roll axles by means of arms extending both forwardly and rearwardly from the fixed rod which usually extends along the under side of the platen and unites the ends of the platen frame in the well known Underwood machine. Upon said rod I mount collars, upon opposite sides of which I provide studs, around which are coiled springs, the free ends whereof bear against said rollsupporting arms to ress the rolls against the platen. I also plVOt upon the opposite sides of said collars a series of arms, one to bear against each spring to regulate its tension; each arm having an car through which a screw is threaded to bear against. a lug on the collar, whereby the arms may be set up to increase the tension of the springs individually as required.

Another object of the invention is to facilitate the introduction of paper into the bite of the rear n'essurc rolls and the platen. The paper shel has usually a fixed relation to the platen and hence is placed at some distance from the rear side thereof, to Jermit the introduction of a thick sheet of sheets, when required. The rear pressure rolls. however, are usually made of rather small diameter, owing to ark of room; and so it results that an unduly large proportion of each pressure roll projects up through or past the bottom of the paper shelf, and in consequence the sheets when introduced 110- l Types 2 strike against its frontside. It has 11d tween the paper shelf and the platen, are apt to catch upon the top or crown of the roll, to the annoyance of the operator. To overcome this objection I provide a yield ing deflector which extends upwardly from the rear pressure rolls for a short distance in front of the paper shelf and behind the platen, and guides the leading edge of the sheet downwardly and forwardly to the bite of the pressure roll and platen, so that said edge cannot-catch upon the tops of the pressurerolls, but enters readily between the rolls and the platen without attention on the part of the operator, beyond dropping the sheet into the machine. This deflector is pivoted at its rear end behind the paper shelf and above the pressure rolls, and curves around the bottom and up in front of the platen to form a. paper guide. It is yieldingly supported at its forward portion to accommodate thick sheaves or wads of paper. From the bottom of the paper shelf tongues project downwardly and forwardly through openings in the hinged yielding deflector, the line of intersection of the tongues and the deflector being some distance above the tops of said pressure rolls.

In the accompanying drawings, Figure 1 is a perspective view of the adjustable and releasable spring devices for pressing the roll arms toward the platen. Fig. S2 is a part-sectional elevation to illustrate the relation of the main paper shelf, tho yielding guide-plate and the pressure rolls; the parts shown in normal positions. F12. 3 is a per-.

speetlve front bottom view of the platen frame of an Underwood typcwriting machine with the present improvements applied tbereio. Figs. 4; and. 5 are part-sectional elevations of the pressure-roll releasing mechanism; Fig. 4 showing the rolls released and Fig. 5 showing them in normal positions. Fig. 6 is a bottom view of the platen frame. pressure rolls. guiding plalc. etc. Fig. 'l' is a front perspective vii-w to illustrate the relation between the main paper shelf and the yielding guide )lal'r which curves around the bottom oi the platen. Fig. 8 is a part-sectlolml side vlorution of the platen frame. paper shelf, guide plate, 010., showing: the parts in normal 11o sltions.

The cylindrical platen is indicated as l.

fed forwardly around the latter. It will also be understoml that if many sheets are inserted together, the )late 41 will yield to permit them to pass orwurlilly around the platen, said plate yieldm independently of the pressure rolls. The p ate guides a single sheet directly almost to the line of contact between the pressure roll and the platen, and for this purpose runs very close to the platen, without however preventing the introduction of a thick pile of sheets. because it can yield to accoimnodate said pile.

It will be observed that the portions 49 of the yielding guide plate which intervene between or alternate with the recesses 44 constitute a set of yielding lingers or tongues to guide the sheets into the bite of the pressure rolls 1% of the platen. said yielding fingers 49 intersecting the paper shelf at a point well above said pressure rolls for the purpose stated, and preferably interdigitated with the fingers or tongues 39 which project downwardly from the bottom of the paper shelf.

Variations may be resorted to within the scope of the invention, and portions of the improvements may he used without others.

Having thus described my invention, I claim:

1. In a typewriting machine. the combination with a platen and forward and rear rolls running thereon, of a rod fixed to the platen frame between said rolls, supporting arms extending from said rod to said rolls, springs mounted upon said rod and bearing against said arms, one spring for each arm, yoltes embracing said rod and having books or means to engage said springs, and a keyoperated rockshaft mounted upon said platen frame and having cams to engage within said yokes to cause them to pull said springs away from said arms.

2. In a t-ypewriting machine. the combinalion with a platen and forward and rear rolls running thereon, of a rod fixed to the platen frame between said rolls. supporting arms extending from said rod to said rolls. springs mounted upon said rod and bearing; against said arms. adjustment arms mounted on said rod to engage said springs to regulale their tension. and means to set said regulating arms.

3. In a typcwriling machine. the comhiuation with a platen and forward and rear rolls running thereon. of a rod fixed to the platen frame between said rolls. supporting:

arms extending from said rod to said rolls. springs mount-0d upon said rod and bearing against said arms. adjustment arms mounted on said rod to engage said springs to regulate their tension. and menus to set said regulating: arms: said regulating: arms mounted upon opposite sides of collars so- 5 cured to said rod.

4. In a typewrllmg machine, the combination with u platen and forward and rear rolls running thereon, of a rod fixed to the platen frame between said rolls, supporting arms extending from said rod to said rolls, springs mounted upon said rod and hear ing against said arms, adjustment arms mounted on said rod to engage said springs to regulate their tension, and means to set said regulating arms; said regulating arms mounted upon 0 posit-e sides of collars socured to said rot, and each of said collars having nbutluents against which said regulating means bear.

5. In a typcwrlting machine, the combination with a platen and forward. and rear rolls running thereon, of arod fixed to the platen frame between said rolls. supporting arms extending from said rod to said rolls, springs mounted upon said rod and bearing against said arms, adj ust-ment arms mounted on said rod to engage said springs to regulate their tension, and means to set said regulating arms; said regulating arms mounted upon opposite sides of collars secured to said rod, and each of said collars having abutments against which said reguhating means bear; said regulating means consisting of screws threaded through ears formed on said arms.

6. In at-ypewriting machine, the combination with a platen and forward and rear rolls running thereon, of a rod fixed to the platen frame between said rolls, supporting arms extending from said rod to said rolls. springs mounted upon said rod and hearing against said arms. adjustment. arms mounted on said rod to engage said springs to legulate their tension. and means to set said regulating arms. said regulating arms mounted upon opposite sides of collars scoured to said rod, and said springs rolled around studs secured upon said collars.

7. In a typcwriting machine. the combination with a platen and forward and rear rolls running thereon. of supporting arms extending to said rolls. springs bearing against said arms. yokes embracing a rod and having books or means to engage said springs, and a key-operated rock-shaft mounted upon said platen fltlllll' and having cams to engage within said yokes to cause them to pull said springs away from said arms.

8 In a typewriting machine. the combination with a platen and forward and rear rolls running: thereon. of a rod lixed to the plal'cn t'ramo between said rolls. supporting arms extending from said rod to said rolls. springs mounted upon said rod and hearing against said arms. pokes embracing said rod and having hooks or means to engage said springs. and u kcy-(qwrut'od rm-k-shufi mounted upon said nlulou from! and having cums to engage within said ynlu-s to cause them to pull said springs away from said till arms. said, okes being 'uidcd at their open ends hpon d uid rod aud at their joined ends upon said rock-shaft.

9. The combination with u revoluble platen, of a platen frame having a paper shelf in rear of the platen, tongues at intervals along the bottom of said paper shelf extending downwardly therefrom, a hm ed paper-guiding plate curving forwardly enea-th said platen, sand paper guid ng plate having cutaways through which said tongues project, and a ser es of pressure rolls rising through openings in said paper-guiding plate at the portion thereof WlllGh 1s located between said tongues and the platen.

10. The combination with a revoluble platen, of a platen frame having a paper shelf in rear of the platen, tongues at latervals along the bottom of said paper shelf ex 4 tending downwardly therefrom, a lunged paper-guiding plate purring forwardly beneath said platen, said paper guid ng plate having cutaways through which said tongues project, a series of pressure rollsi rising through openings 1n said papewgiud- 1 ing plate at the portion thereof which is 10- j cated between said tongues and the platen, a 5 second series of pressure rolls provided to run upon the under front side of the platen, and a key having means to drop all of sold pressure rolls together with said guiding plate from the bottom of the platen.

11. The combination with a revoluble platen, of a platen frame having a paper shelf in rear of the platen, tongues at intervals along the bottom of said paper shelf extending downwardly therefrom, a hinged paper-guiding plate curving forwardly beneath said platen, said paper guiding plate having cutaways through which said tongues project, a series of pressure rolls rising through openings in said paper-guiding plate at the portion thereof which is located between said tongues and the platen,a second series of pressure rolls provided to run upon the under front side of the platen, and a key having means to drop all of said f pressure rolls together with said guiding plate from the bottom of the platen; said guiding plate having spring lingers whereby i its forward portion is supported upon axles i of the forward pressure rolls. l

12. The combination with a rovoluble platen, of a platen frame having a paper; shelf inclining forwardly and downwardly behind the platen to the bottom thereof, paper-guiding tongues at intervals along the bottom of said paper shelf extending downwardly and forwardly therefrrun, a paper guiding plate hinged in rear of said paper shelf and curving forwardly beneath and up 2 around the front of said platen and support- 1 ed yicldingly at its forward portion, said paper guiding plate having cut-aways down through wlndh said tongues project, and a 5 ings in said i tion thereof erases series of pressure rolls rising through openpa )8! guiding plate at the porwhich is located between said tongues and the platen, so that said plate may serve as a yielding deflector to guide the sheets away from the pa or shelf and into the bite of the pressure rolls and platen.

13. The combination with forward and rear pressurcroll axles supported by means of arms extending both forwardly and real wardly from a fixed rod which extends along the under side of a platen and unites the ends of a platen frame, of collars upon said rod and having upon their opposite sides studs, around which are coiled springs, the free ends whereof bear against said rollsupporting arms to press the rolls against the platen.

14. The combination with forward and rear pressure-roll axles supported by means of arms extending bot-h forwardly and rearwardly from a fixed rod which extends along the under side of a platen and unites the ends of a platen frame, of collars upon said rod and having upon their opposite sides studs, around which are coiled springs, the

freeends whereof bear against said roll supporting arms to press the rolls against the platen, and a series of arms pivoted upon the opposite sides of said collars, one to bear against each spring to regulate its tension; each arm having an car through which a screw is threaded to bear against a lug on the collar, whereby the arms may be set up to increase the tension of the springs individually as re uircd.

'15. The com ination with a paper shelf, a platen, a pressure roll, and menus for supporting said roll, of a deflector which extends upwardly from the pressure roll for a short (.listulu-o in front of the paper shelf and behind the platen and is mounted to yield iudewendvntly of said roll, to guide the leading edge of the sheet downwardly and forwardly to the bite of the pressure roll. and. platen, so that said edge cannot catch upon the top of the pressure roll, but may enter readily l'ietwc'cu the roll and the platen without attention on the part of the o])cr him.

16. The combination with a paper shelf, a plan-u, a pressure roll, and means for supuu'tiug shill roll. of a yielding deflector which extends upwardly from the pressure roll for a short distance in front ot'thc paper shell and behind the platen, to guide lllt leading edge of the shoot duwmvurdly and forwardly to the bite of the pressure roll and platen. so that said wdgo cannot oulrh upon the top ol the pressure roll. but. may ruler readily between the roll and the platen without attention on the part of the operator. u'ul tlrlloclm' intersecting said paper shelf and pivoled at its rear curl behind the paper shelf and above the pressure roll, and

lOO

. motion with -a.'.;pa p p ssnrehroll I said-roll, of, a; yielding "deflector which extends' upwardly from-the ressiire. rollfor a short dlstance in front-of t e paper 'shelf'and behind -the.fp laten, -to guide the" leading' edge of the sheetdownwa-rdly and forwardly to the =bite' 'of the pressure-roll and platen, so that said edge cannot catch upon the top of the-pressure roll,- but may enter readily between the roll and the platen without attention on the epart of the operator, said deflector pivot behind the paper shelf and above the pressure roll, and curving around the-bottom of the laten to form a paper aide, and being yiel ingly supported at its orward-portion, and paper-(gin ing tongues projecting clownwardlyan orwardly'from the bottom of the paper shelf through openings in the bin ed yielding deflector, the line of intersection of the tongues and the deflector heing well above the top of said pressure roll.

18. The combination with a revoluble platen, a platen frame having a fixed paper shelf extendin downwardly and rearwardly back of the p aten, a series of pressure rolls extending along the under rear side of the platen,-and means for supporting said rolls, of fingers leading forwardly and downwardlv from the lower .portion of the paper shelf etween said ressure rolls, and construeted to yield in ependently of the rolls,

belt-gel; and s-nieans for supi at its rear end ids-the sheets forwardly from the paper shot into the bite of the pressure rolls and platen.

19." The combination with a revoluble platen, a platen frame having a fixed pa er "shelf extending downwardly and ran-war ll?! jhaek of the platen, a series of pressure ro s extending along the under rear.side of the platen, and means for supporting said rolls, of fingers leading forwardly and downwnrdlv' from the lower portion of the paper shelf between said ressurc rolls, and constructed to yield in ependentlv of the rolls, to guide the sheets forwardly from the paper she f into the bite of the pressure rolls and platen, said yieldim fingers intersecting the paper shelf at a point well above said pressure rolls, so that paper cannot. catch on the top of the rolls.

.20. The combination with a revoluble platen, a platen frame having a fixed paper shelf extending downwardly and rearwardly back of the platen, and a series of pressure rolls extending along the under rear side of the laten, of yielding fingers leading forwardly and downwardly from the lower portion of the paper shelf between said pressure rolls, to guide the sheets forwardly from the paper shelf into the bite of the pressure rolls and platen, said yielding fingelS being interdigitated with fingers or tongues "which project downwardly from the bottom of the paper shelf.

FRANK A. COOK.

Witnesses M. PYORKMAN, LYMAN D. Bnouen'rox. 

